Capitalism is dead on. If you aren't picking up WoTN, why are you getting Blade Barrier? Why get Icy Touch? Why get Toughness? There is no argument against it... it works on damage that will kill you. Not dying is the point of tanking. It works on ALL damage types, unlike the holy grail talents of tanking Toughness and Anticipation.
It just boggles my mind that anyone attempts to argue against picking it up.